<template>
    <div>
        <!-- 面包屑导航 -->
         <el-breadcrumb separator-class="el-icon-arrow-right">
           <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
           <el-breadcrumb-item>数据统计</el-breadcrumb-item>
           <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
           <!-- 2.为 ECharts 准备一个具备大小（宽高）的 DOM -->
          <div id="main" style="width: 600px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入echarts
import echarts from 'echarts'
import _ from 'lodash'
export default {
  data() {
    return {
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created() {},
  mounted() {
    // 3.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))
    // 获取option数据
    this.$http.get('reports/type/1').then(res => {
      if (res.data.meta.status !== 200) return this.$message.error('获取报表数据失败')
      // 4.准备数据和配置项
      const result = _.merge(res.data.data, this.options)
      // 5.展示数据
      myChart.setOption(result)
    })
  }
}
</script>
